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            <h1>Roll Your Own Google Docs with Collabora On NextCloud</h1>
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          <h2>Installing Collabora Office</h2>

<ol>
	<li>Log into the Linux device</li>
	<li>Run the following commands in a terminal:
	<div class="codeBlock"># install signing key<br />
	sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 0C54D189F4BA284D<br />
	# add software repository<br />
	sudo echo &#39;deb https://www.collaboraoffice.com/repos/CollaboraOnline/CODE-debian10 ./&#39; &gt;&gt; sudo /etc/apt/sources.list<br />
	# update software repositories<br />
	sudo apt update<br />
	# install loolwsd and code-brand<br />
	sudo apt install loolwsd code-brand<br />
	# enable required Apache modules<br />
	sudo a2enmod proxy proxy_wstunnel proxy_http ssl</div>
	</li>
</ol>

<h2>Creating SSL Certificates</h2>

<ol>
	<li>Launch XCA</li>
	<li>Open the PKI database if it is not already (File &gt; Open DataBase), enter password</li>
	<li>Click on the Certificates tab, right click on your Intermediate CA certificate</li>
	<li>Select New</li>
	<li>On the Source tab, make sure Use this Certificate for signing is selected</li>
	<li>Verify your Intermediate CA certificate is selected from the drop down</li>
	<li>Click the Subject tab</li>
	<li>Complete the Distinguished Name section
	<p>internalName: nettools.i12bretro.local<br />
	countryName: US<br />
	stateOrProvinceName: Virginia<br />
	localityName: Northern<br />
	organizationName: i12bretro<br />
	organizationUnitName: i12bretro Certificate Authority<br />
	commonName: nettools.i12bretro.local</p>
	</li>
	<li>Click the Generate a New Key button</li>
	<li>Enter a name and set the key size to at least 2048</li>
	<li>Click Create</li>
	<li>Click on the Extensions tab</li>
	<li>Select End Entity from the type list</li>
	<li>Click Edit next to Subject Alternative Name</li>
	<li>Add any DNS or IP addresses that the certificate will identify</li>
	<li>Update the validity dates to fit your needs</li>
	<li>Click the Key Usage tab</li>
	<li>Under Key Usage select Digital Signature, Key Enchiperment</li>
	<li>Under Extended Key Usage select Web Server and Web Client Authentication</li>
	<li>Click the Netscape tab</li>
	<li>Select SSL Server</li>
	<li>Click OK to create the certificate</li>
</ol>

<h2>Exporting Required Files</h2>

<ol>
	<li>In XCA, click on the Certificates tab</li>
	<li>Right click the Intermediate CA certificate &gt; Export &gt; File</li>
	<li>Set the file name CA.pem and verify the export format is PEM chain (*.pem)</li>
	<li>Click OK</li>
	<li>Right click the SSL certificate &gt; Export &gt; File</li>
	<li>Set the file name with a .crt extension and verify the export format is PEM (*.crt)</li>
	<li>Click OK</li>
	<li>Click the Private Keys tab</li>
	<li>Right click the private key generated for the SSL certificate &gt; Export &gt; File</li>
	<li>Set the file name with a .key extension and verify the export format is PEM private (*.pem)</li>
	<li>Click OK</li>
</ol>

<h2>Applying the Certificates</h2>

<ol>
	<li>Download WinSCP <a href="https://winscp.net/eng/downloads.php" target="_blank">Download</a></li>
	<li>Extract WinSCP and run the executable</li>
	<li>Connect to the Collabora Online server via WinSCP</li>
	<li>Copy the created .crt, .key and .pem files to ~/</li>
	<li>On the Collabora Online server, run the following command in a terminal
	<div class="codeBlock">sudo cp ~/nettools.i12bretro.local.crt /etc/ssl/certs/<br />
	sudo cp ~/nettools.i12bretro.local.key /etc/ssl/certs/<br />
	sudo cp ~/CA.pem /etc/ssl/certs/<br />
	# edit the configuration file<br />
	sudo nano /etc/loolwsd/loolwsd.xml</div>
	</li>
	<li>Edit the loolwsd.xml file, find the SSL block and update the cert_file_path, key_file_path and ca_file_path values
	<p>&lt;cert_file_path desc=&quot;Path to the cert file&quot; relative=&quot;false&quot;&gt;/etc/ssl/certs/nettools.i12bretro.local.crt&lt;/cert_file_path&gt;<br />
	&lt;key_file_path desc=&quot;Path to the key file&quot; relative=&quot;false&quot;&gt;/etc/ssl/certs/nettools.i12bretro.local.key&lt;/key_file_path&gt;<br />
	&lt;ca_file_path desc=&quot;Path to the ca file&quot; relative=&quot;false&quot;&gt;/etc/ssl/certs/CA.pem&lt;/ca_file_path&gt;</p>
	</li>
	<li>Press CTRL+W and search for wopi</li>
	<li>Add a new host for the DNS name of the NextCloud server<br />
	<host allow="true">nettools.i12bretro.local</host></li>
	<li>Press CTRL+O, Enter, CTRL+X</li>
	<li>Continue the configuration by running the following commands in terminal:
	<div class="codeBlock"># create CODE proxy configuration file<br />
	sudo nano /etc/apache2/conf-available/code.conf</div>
	</li>
	<li>Paste the following into code.conf
	<p>Options -Indexes</p>

	<p>#Encoded slashes need to be allowed<br />
	AllowEncodedSlashes NoDecode</p>

	<p># Container uses a unique non-signed certificate<br />
	SSLProxyEngine On<br />
	SSLProxyVerify None<br />
	SSLProxyCheckPeerCN Off<br />
	SSLProxyCheckPeerName Off</p>

	<p># keep the host<br />
	ProxyPreserveHost On</p>

	<p># static html, js, images, etc. served from loolwsd<br />
	# loleaflet is the client part of Collabora Online<br />
	ProxyPass /loleaflet https://127.0.0.1:9980/loleaflet retry=0<br />
	ProxyPassReverse /loleaflet https://127.0.0.1:9980/loleaflet</p>

	<p># WOPI discovery URL<br />
	ProxyPass /hosting/discovery https://127.0.0.1:9980/hosting/discovery retry=0<br />
	ProxyPassReverse /hosting/discovery https://127.0.0.1:9980/hosting/discovery</p>

	<p># Capabilities<br />
	ProxyPass /hosting/capabilities https://127.0.0.1:9980/hosting/capabilities retry=0<br />
	ProxyPassReverse /hosting/capabilities https://127.0.0.1:9980/hosting/capabilities</p>

	<p># Main websocket<br />
	ProxyPassMatch &quot;/lool/(.*)/ws$&quot; wss://127.0.0.1:9980/lool/$1/ws nocanon</p>

	<p># Admin Console websocket<br />
	ProxyPass /lool/adminws wss://127.0.0.1:9980/lool/adminws</p>

	<p># Download as, Fullscreen presentation and Image upload operations<br />
	ProxyPass /lool https://127.0.0.1:9980/lool<br />
	ProxyPassReverse /lool https://127.0.0.1:9980/lool</p>
	</li>
	<li>Press CTRL+O, Enter, CTRL+X</li>
	<li>Continue the configuration by running the following commands in terminal:
	<div class="codeBlock"># edit default SSL configuration file<br />
	sudo nano /etc/apache2/sites-available/default-ssl.conf</div>
	</li>
	<li>Add the following line just above the /VirtualHost tag
	<p>Include /etc/apache2/conf-available/code.conf</p>
	</li>
	<li>Press CTRL+O, Enter, CTRL+X</li>
	<li>Continue the configuration by running the following commands in terminal:
	<div class="codeBlock"># edit NextCloud configuration file<br />
	sudo nano /var/www/nextcloud/config/config.php</div>
	</li>
	<li>Find the trusted_domains array and add the DNS used for the SSL certificate</li>
	<li>Press CTRL+O, Enter, CTRL+X</li>
	<li>Continue with the following commands to restart loolwsd and apache2 to apply the changes:
	<div class="codeBlock">sudo systemctl restart loolwsd apache2</div>
	</li>
	<li>Open a web browser and navigate to https://DNS:9980</li>
	<li>If everything is working as expected the message OK should be shown</li>
</ol>

<h2>Adding Collabora Office to NextCloud</h2>

<ol>
	<li>Log into NextCloud with an administrative user</li>
	<li>Click the user avatar &gt; Apps</li>
	<li>Select Office &amp; text from the left navigation</li>
	<li>Scroll down to find the Collabora app &gt; Click Download and enable</li>
	<li>After the download completes, click the user avatar &gt; Settings</li>
	<li>Click Administration &gt; Collabora Online Development Edition in the left navigation</li>
	<li>Enter the URL in the Collabora Online-server field &gt; Click Save</li>
	<li>If the above option does not appear, you can complete the same terminal by running:
	<div class="codeBlock">cd /var/www/nextcloud<br />
	sudo -u www-data php occ config:app:set --value https://nettools.i12bretro.local:9980 richdocuments wopi_url</div>
	</li>
	<li>Click on Files in the top navigation</li>
	<li>Click the + icon &gt; Select New Document</li>
	<li>Give the document a name and press Enter</li>
	<li>The new document should load in a word processor inside the web browser and be ready for editing</li>
</ol>

<p>Source: <a href="https://www.collaboraoffice.com/code/linux-packages/" target="_blank">https://www.collaboraoffice.com/code/linux-packages/</a></p>
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